I just uploaded a video of our family signing some traditional Christmas songs to YouTube. There is no musical instruments or pre-recorded backup. We have a mix of teenagers and small kids who sing at different tempos and levels of enthusiasm. Just barely passes as singing.
YouTube reported that there was a copyright claim against my video. When I clicked details it reported "Entity: Music Publishing Rights Collecting Society Content Type: Musical Composition".
It was my understanding that singing or humming a song was not considered violation according to YouTube, but singing along, or using backup music was. Is this a case of YouTube's detection algorithm going overboard, or just the usual overbearing copyright law?